When Napoli take on Chelsea in the Champions League on Wednesday night at Stamford Bridge, they'll encounter a very different club to the one they tore to shreds in Naples three weeks ago.

Andre Villas-Boas' side were without a league win since mid-January, with the 34-year-old staring down the barrel somewhat after watching Ezequiel Lavezzi and co put them on the brink of Champions League elimination.

Three weeks on, and with Villas-Boas sacked and Roberto Di Matteo bumped up for the remainder of the season, optimism has returned to the Blues camp. Against the standards of whats gone before, one defeat from their four games since being humiliated in Italy is decent showing for Chelsea, while John Terry's return to fitness is a welcome boost.

Napoli have swept aside Inter Milan, Parma and Cagliari in the intermitting period, with Lavezzi notching in each of the victories. However with Chelsea requiring just a two-goal victory on Wednesday evening, the tie is far from a forgone conclusion.

GMF looks at why Di Matteo's side can be confident of going through….
 

John Terry's return

For all the headlines written about the former England captain, Terry's involvement is likely to be crucial to Chelsea's chances. Without Terry, The Blues floundered in the first leg, and even though he won't solve their defensive problems on his own, he'll provide a much needed direction at the back.
 

Chelsea 3-0 Valencia

With this group of players, Chelsea have shown already this season they're up to the challenge of producing a performance worthy of their Champions League status. The ruthless nature of their evenings work was reminiscent to the days under Jose Mourinho, when dispatching even the toughest of opponents was done without alarm.
 

Napoli's big match experience

Despite sweeping aside Manchester City and Villarreal in their debut season in the Champions League with their free flowing football, we're yet to see how Napoli react when their backs are against the wall. They were behind for just 11 minutes for their produced a three-goal blitz, but on the road are they likely to be as attacking? An early Chelsea goal could provide us with the answers.
 

Feeble Napoli defence

A factor that Chelsea didn't exploit to a great enough extent in the first leg, but one that led to their opening goal. While Chelsea will recall Terry into their faltering back-four, Napoli are likely to go with the same defence that allow Juan Mata to open the scoring. Thereafter Chelsea created numerous opportunities and will have taken encouragement ahead of the return game where they're unlikely to be as wasteful.

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UEFA Champions League